The Performance Simulation of MIMO/OFDM Networks with Group-Selected Arrays Signal Processing under Imperfect CSI

Abstract

Adaptive arrays signal processing at both the transmitter and receiver has been regarded as a key technique with which OFDM can be combined to further improve the performance of wireless network, but they are characterized by a relatively higher implementation complexity. Selection diversity is the simplest way to realize spatial diversity, but the performance improvement of this form of diversity is limited. In this paper, we combine the benefits of these two spatial signal processing and propose a group-selected arrays signal processing approach for MIMO/OFDM networks. In this new scheme, adaptive arrays is group-selected in the spatial domain. Simulation shows that the proposed system can get significant performance improvements over the conventional array based OFDM systems over frequency-selective multipath fading channels with imperfect CSI.